Examine source code of Polly - Colly //

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Polly - Colly //",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-013-06591d4ad28ab7b9ee90f62f81d6b505.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(89, 27, 163, 0.94)",
      "toolbar_text": "rgb(231, 219, 18)",
      "frame": "rgb(184, 231, 36)",
      "tab_background_text": "rgb(68, 16, 132)",
      "toolbar_field": "rgba(207, 0, 255, 0.49)",
      "toolbar_field_text": "rgb(71, 255, 161)",
      "tab_line": "rgba(0, 0, 0, 0.7)",
      "popup": "rgba(43, 43, 43, 0.37)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgba(94, 16, 16, 0.66)",
      "button_background_hover": "rgba(44, 45, 43, 0.77)",
      "frame_inactive": "rgba(190, 21, 21, 0.66)",
      "icons": "rgba(234, 165, 74, 0.88)",
      "ntp_background": "rgba(123, 91, 61, 0.37)",
      "ntp_text": "rgba(235, 255, 18, 0.96)",
      "popup_border": "rgb(242, 182, 20)",
      "popup_highlight_text": "rgba(232, 89, 213, 0.45)",
      "sidebar_border": "rgba(153, 146, 23, 0.45)",
      "sidebar_highlight_text": "rgba(200, 34, 154, 0.79)",
      "sidebar_highlight": "rgba(74, 234, 195, 0.99)",
      "sidebar_text": "rgb(89, 27, 163)",
      "tab_loading": "rgba(0, 0, 0, 0.7)"
    }
  }
}